[Elecraft] K3: power out & V, A readings

[DOUGLAS ZWIEBEL]

Well, prompted by the interesting discourse here, I decided to ignore
my bulk and get on the floor to make some measurements at the PS
(RS35A).

K3 on Receive: 13.60 volts
K3 at 120 watts output:  13.59 volts

Hmmmm.

Okay, so then did voltage (and amp) readings using the K3 itself.
Watts are also read from the K3.

Receive:  13.6  /  0.75

Xmit :
watts output / voltage / amps (xmit is CW, key down)
0.0 / 13.4  /  1.75
1.0 / 13.4  /  2.14
2.0 / 13.4  /  2.49
3.0 / 13.3  /  2.66
4.0 / 13.3  /  2.84
5.0 / 13.3  /  2.96
10 / 13.1  /  3.61
12 / 13.1  /  3.88
13 / 13.3  /  7.48   (KPA kicks in)
20 / 13.3  /  8.64
30 / 13.2  /  10.21
40 / 13.2  /  11.38
50 / 13.1  /  12.45
60 / 13.1  /  13.20
70 / 13.1  /  14.07
80 / 13.1  /  14.83
90 / 13.1  /  15.64
100 / 13.0  /  16.40
110 / 13.0  /  16.97
120 / 12.9 flickering to 13.0  /  17.66

Well, the Astron appears to be VFB after about 3 decades of service.  :-)

So...do these numbers tell us anything?

de Doug KR2Q